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1.
选用1日龄樱桃谷肉鸭1600羽,随机分成4组,分别饲喂4种不同处理的日粮,以研究酶制剂在肉鸭日粮中应用效果。对照组饲喂基础日粮不添加酶制剂;试验1组为饲喂基础日粮并添加酶制剂250 g/t;试验2组和3组分别饲喂能量降低250.8 MJ/kg和334.4/kg基础日粮,并添加酶制剂250 g/t。结果表明:在基础日粮和降低能量的日粮中添加酶制剂,均能提高肉鸭日增重,改善饲料转化率和能量消化率。其中,基础日粮中添加酶制剂,能显著提高肉鸭日增重和饲料利用率(P<0.05),能量消化率最高,按毛利润计算,试验组肉鸭收益率分别比对照组提高了7.02%、4.45%和5.26%。 相似文献
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摘要：本试验旨在研究不同方法处理的玉米青贮饲喂肉牛效果对比,选择体重340kg左右的西门塔尔杂交牛30头,随机分为3组,保证精饲料不变,粗饲料分别饲喂3种不同方法处理的玉米青贮,其中试验Ⅰ组为全株玉米青贮、试验Ⅱ组添加剂全株玉米青贮、试验Ⅲ组玉米秸秆黄贮,试验期70d。结果表明：1）试验Ⅱ组的平均日增重极显著高于试验Ⅰ组、试验Ⅲ组（P＜0.01）,分别比Ⅰ组、Ⅲ组高出17.57%、65.71%;Ⅲ组干物质采食量显著高于Ⅰ组、Ⅱ组（P＜0.05）;Ⅰ组和Ⅱ组料重比极显著低于Ⅲ组（P＜0.01）。试验Ⅱ组养殖效益最高为14.14元?天-1?头-1,比试验Ⅰ组高5.05元,比试验Ⅲ组高15.74元。综上,添加剂全株玉米青贮饲喂肉牛效果和养殖效益最佳,全株玉米青贮、玉米秸秆黄贮次之。 相似文献
3.
Lei Long Feng Zhi Li Qiang Xue Xiaoqiang Zhang Dandan Liu Zhengya Liu Yulan Ren Ying Zhao Shengjun 《Tropical animal health and production》2019,51(5):1049-1056
The effect of dietary supplementation with fermented cassava bioethanol waste (FCBW) on the growth performance and meat quality was evaluated in 80 15-day-old male Cherry Valley meat ducks with an initial body weight (BW) of 250.67 ± 7.50 g. The experiment has 5 replications and 4 treatments and 4 ducks per treatment. Four groups (groups I, II, III, IV) supplemented with 0%, 5%, 10%, and 15% FCBW substituted for part of maize, soybean meal, and bran in basal diet and were fed for 29 days; the metabolizable energy and content of lysine in the four groups were equal. The results indicated that there were no significant differences in average daily weight gain and average daily feed intake among the four groups (P > 0.05). The digestibility rate of dry matter, ash, and phosphorus in group IV was significantly lower than that in group I by 5.23%, 6.25%, and 6.40% respectively (P < 0.05), but the digestibility rate of crude fat was significantly higher than that in group I by 8.30% (P < 0.05). No significant differences were presented among different levels of FCBW supplementation in carcass yield, eviscerated carcass yield, and semi-eviscerated carcass yield (P > 0.05), but 5% FCBW can improve the carcass yield relatively. In conclusion, with dietary supplementation of 5% FCBW, a better growth performance in meat ducks could be achieved.
相似文献4.
T.‐T. Zhang Z.‐Q. Zhang X.‐H. Gao F.‐H. Yang X.‐M. Xing 《Journal of animal physiology and animal nutrition》2013,97(2):271-277
This study investigated digestibilities of nutrients and feed efficiency in female mink at the different dietary protein levels during the mink growth period. Effects of dietary protein on growth performance of minks were also measured. Sixty 45‐day‐old healthy female minks were randomly assigned to 6 treatment groups with 10 animals in each group. Animals were fed diets varying in protein levels: 28% (Group I), 30% (Group II), 32% (Group III), 34% (Group IV), 36% (Group V) and 38% (Group VI), respectively. The digestibilities of key nutrients were determined on Day 14 after initiating the experiment and the last 3 days. From the beginning of the study, body weight and feed intake were weighed and recorded every other week in order to calculate the average daily bodyweight gain and the feed efficiency. The trial had demonstrated that nitrogen intake was greatly significantly different, which was affected by dietary protein levels (p < 0.001). Growth performance of minks was impaired when dietary protein level was at 28%. When dietary protein level was at 34%, minks had the best daily gains, feed efficiency, and digestibilities of some key nutrients. 相似文献
5.
自然霉变玉米对肉鸭生产性能和养分消化率的影响 总被引：1，自引：1，他引：0
试验旨在研究含黄曲霉毒素B1为主的自然霉变玉米对肉鸭生产性能和养分消化率的影响。试验设玉米组、霉变玉米组、采食量配对组3个处理,每个处理8个重复,每个重复16只,试验期14 d。结果表明:在0～7 d、8～14 d和0～14 d,与正常组比,霉变组日采食量和日增重极显著降低(P<0.01)、死亡率提高5.47%(P<0.01);与正常组和采食量配对组比,霉变组全期饲料增重比分别降低4.90%和5.56%(P<0.01),干物质消化率分别提高3.78%和3.75%(P<0.01),粗蛋白消化率分别提高2.65%和4.63%(P<0.01),总氨基酸消化率分别提高3.9%和3.98%(P<0.01)。与正常组比,霉变组食糜在食管膨大部和空肠停留时间分别延长37.78%和55.94%(P<0.05)。自然霉变玉米抑制肉鸭采食,降低增重,同时延长食糜在消化道的停留时间,提高养分消化率、降低饲料增重比。 相似文献
6.
Pearson W Boermans HJ Bettger WJ McBride BW Lindinger MI 《American journal of veterinary research》2005,66(3):457-465
OBJECTIVE: To characterize hematologic and clinical consequences of chronic dietary consumption of freeze-dried garlic at maximum voluntary intake in horses. ANIMALS: 4 healthy sex- and age-matched horses. PROCEDURE: An initial garlic dose (0.05 g/kg, twice daily) was fed to 2 horses in a molasses carrier as part of their normal ration and was gradually increased to maximum voluntary intake (0.25 g/kg, twice daily) over 41 days. Dietary supplementation then continued for a total of 71 days. Two control horses were fed molasses with no garlic with their ration. Blood samples were collected weekly and analyzed for hematologic and biochemical changes, including the presence of Heinz bodies. Recovery of affected blood values was followed for 5 weeks after termination of dietary supplementation with garlic. RESULTS: At a daily dose of > 0.2 g/kg, horses fed garlic developed hematologic and biochemical indications of Heinz body anemia, as characterized by increases in Heinz body score (HBS), mean corpuscular volume (MCV), mean corpuscular hemoglobin, platelet count, and serum unconjugated and total bilirubin concentrations and decreases in RBC count, blood hemoglobin concentration, mean corpuscular hemoglobin concentration, and serum haptoglobin concentration. Recovery from anemia was largely complete within 5 weeks after termination of dietary supplementation with garlic. Heinz body score and MCV remained high at the end of the 5-week recovery period. CONCLUSIONS AND CLINICAL RELEVANCE: Horses will voluntarily consume sufficient quantities of garlic to cause Heinz body anemia. The potential for garlic toxicosis exists when horses are chronically fed garlic. Further study is required to determine the safe dietary dose of garlic in horses. 相似文献
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8.
本试验旨在研究饲粮复合酶制剂水平对北京填鸭胴体性状、体脂沉积和营养物质表观消化率的影响。选取35日龄健康、大小均匀的雄性北京鸭96只,随机分成4个组,每个组6个重复,每个重复4只鸭。对照组饲喂玉米-豆粕型基础饲粮,试验1组、试验2组和试验3组饲粮分别在基础饲粮中添加100、200和300 mg/kg的复合酶制剂,试验鸭在35和36日龄饲粮填饲量分别为260和300 g,之后5 d各组饲粮填饲量均为400 g/d。试验期为7 d。结果表明:1)饲粮复合酶制剂水平对北京填鸭屠体重、屠体率、全净膛重、全净膛率、腿肌重、腿肌率、龙骨长和胸宽均无显著影响(P0.05),而对北京填鸭增重、胸肌重、胸肌率、胸肌厚、肌胃重和肌胃率有显著影响(P0.05)。试验2组和试验3组北京填鸭胸肌重和肌胃重分别比对照组显著提高了7.88%和7.60%(P0.05)。2)饲粮复合酶制剂水平对北京填鸭皮脂重、皮脂率、腹脂重、腹脂率、肝脏重、肝重率和肝脂率均无显著影响(P0.05)。试验1组皮脂厚与对照组相比显著提高了16.2%(P0.05)。3)饲粮复合酶制剂水平对北京填鸭干物质和总能表观消化率无显著影响(P0.05),而对北京填鸭粗蛋白质表观消化率有显著影响(P0.05)。由此可见,饲粮中添加复合酶制剂对北京填鸭体脂沉积无显著影响,但能够提高饲粮中粗蛋白质表观消化率,并促进胸肌和肌胃的生长发育。 相似文献
9.
饲粮精氨酸对0～21日龄樱桃谷肉鸭生长和免疫器官指数的影响 总被引：1，自引：0，他引：1
试验研究了饲粮中不同水平精氨酸(Arginin,Arg)对肉鸭生长、免疫器官重量和结构的影响。选用96只0日龄(刚出壳)樱桃谷鸭,随机分为4个处理,每个处理4个重复,每个重复6只鸭。分别饲喂Arg缺乏的基础饲粮(Arg含量为0.62%)和在基础饲粮中添加0.25%、0.50%、1.00%Arg的试验饲粮。试验期内测定肉鸭的生产性能。21日龄时,屠宰取胸腺、脾脏和法氏囊,测定免疫器官重量,计算免疫器官指数,并制作切片观察组织结构。结果表明,饲粮缺乏Arg显著降低肉鸭的增重(P0.01)和胸腺、脾脏和法氏囊的重量(P0.05);显著降低胸腺、脾脏指数(P0.05),而对法氏囊指数无显著影响(P0.05);添加Arg使鸭的胸腺小叶皮质增厚,胸腺小体增多,脾动脉周围淋巴鞘增厚,脾小结体积变大,法氏囊皱襞发达。说明饲粮Arg水平显著影响肉鸭生长和免疫器官的发育,饲粮Arg含量为1.12%时最佳。 相似文献
10.
试验研究了日粮添加复合异位酸对山羊小肠氨基酸流通量和表观消化率的影响。采用3×3拉丁方试验设计,选用3头安装有永久性瘤胃瘘管、十二指肠近端瘘管和回肠远端瘘管、平均体重为(25.4±0.75)kg的健康麻城黑山羊为试验动物。I组为空白对照,饲喂基础日粮。II组、III组分别饲喂含0.3%和0.6%复合异位酸(钠盐形式)的试验日粮。采用Co-EDTA标记法测定小肠氨基酸流通量和表观消化率。结果显示:III组缬氨酸和异亮氨酸十二指肠流通量极显著高于对照组(P0.01),亮氨酸和必需氨基酸显著高于对照组(P0.05);缬氨酸和丙氨酸的小肠表观消化率显著高于对照组(P0.05)。II组缬氨酸和异亮氨酸十二指肠流通量显著高于对照组(P0.05)。III组异亮氨酸十二指肠流通量显著高于II组(P0.05)。 相似文献
11.
J L Richard A C Pier R D Stubblefield O L Shotwell R L Lyon R C Cutlip 《American journal of veterinary research》1983,44(7):1294-1299
Two of 3 groups of Holstein-Friesian steers (groups II and III; n = 5 each) were fed a ration containing corn naturally contaminated with 800 ng of aflatoxin/g. The other group of steers (group I; n = 5) was fed a ration containing noncontaminated corn. The respective rations were fed for 17.5 weeks, except the ration given to group III; the latter's first diet (contaminated with aflatoxin) was changed to a noncontaminated diet after 15 weeks, continuing for the remaining 2.5 weeks. All steers were killed and tissues and fluids were obtained for aflatoxin analysis. Although aflatoxin B1 and M1 could be detected in blood and urine at several sampling times during the experimental period in groups II and III steers (given the diets containing aflatoxin), there appeared to be no effects on body weight gains and immune phenomena, such as lymphoblastogenesis and antibody production, but there was a waning of the delayed cutaneous hypersensitivity in steers given aflatoxin-contaminated diets. In group III animals (diet was changed to noncontaminated ration at 15 weeks), aflatoxin B1 and M1 disappeared from urine before they were slaughtered. All tissues and fluids, except the rumen contents from these group III steers, were void of detectable aflatoxins B1 and M1 at necropsy. The concentrations of aflatoxin B1 in the rumen content of the latter steers were low. All tissues collected at necropsy from the group II steers fed the aflatoxin diet throughout the 17.5 weeks had detectable aflatoxins B1 or M1 present. 相似文献
12.
E T Lyons J H Drudge D E LaBore S C Tolliver 《American journal of veterinary research》1975,36(6):777-780
A controlled test of the activity of 3 formulations of levamisole, at the dose level of approximately 8 mg/kg, against naturally occurring infections of gastrointestinal parasites and lungworms was made in 24 calves allotted to 4 groups of 6 calves each. Levamisole was administered to group I calves in the drinking water, to group II calves by subcutaneous injection, and to Group III calves by feeding alfalfa pellets mixed in corn silage; group IV calves were nontreated controls. Group I calves consumed the medicated water between 4 hours and 20 minutes and 9 hours and 40 minutes; group III calves consumed the medicated feed within 2 hours and 15 minutes. For calves of group I, II, and III, removals of 4th-stage Ostertagia sp were 64, 23, and 0%; of mature Ostertagia ostertagi, 90, 93, and 83%; and of mature Trichostrongylus axei, 92, 99, and 92%, respectively. For all 3 treated groups of calves, removal was 100% for 4th-stage Cooperia sp and for mature Trichostrongylus colubriformis, Cooperia oncophora, Cooperia punctata, and Oesophagostomum radiatum. Removals of Dictyocaulus vivipara were 90, 90, and 94% for calves of groups I, II, and III, respectively. There was no evidence of toxicosis. At necropsy, 2 calves in group II had small areas of edema at the sites of injection of levamisole. 相似文献
13.
Szabo J Ibrahim WH Sunvold GD Bruckner GG 《American journal of veterinary research》2003,64(3):310-315
OBJECTIVE: To examine effects of dietary protein quality (casein [CA] vs corn gluten [CG]) and dietary lipids (corn oil [CO] vs oil blend [OB] rich in long-chain polyunsaturated fatty acids [LCPUFAs]) on fatty acid composition in liver and adipose tissue after weight loss in overweight cats. ANIMALS: 24 ovariohysterectomized adult cats. PROCEDURE: Cats were allowed ad libitum access to a high-quality diet until they weighed 30% more than their ideal body weight. Cats were then randomly assigned to 1 of 4 weight-reduction diets (6 cats/diet) and were fed 25% of maintenance energy requirements per day. Diets consisted of CG-CO, CA-CO, CG-OB, and CA-OB, respectively, and were fed until cats lost weight and returned to their original lean body mass. Liver biopsy specimens and samples of perirenal, subcutaneous, and abdominal fat were obtained and analyzed for fatty acid content. RESULTS: Following weight loss, fatty acid composition of the liver and adipose tissue was primarily affected by protein quality in that cats fed CA had significantly higher percentages of 20:4(n-6) and 22:6(n-3) fatty acids than those fed CG. Cats fed the CG-CO diet had the lowest concentrations of LCPUFAs, suggesting that dietary lipids and protein quality each influence fatty acid composition in tissues. CONCLUSIONS AND CLINICAL RELEVANCE: These data provide direct evidence that dietary protein quality alters fatty acid composition of tissues during weight loss in cats. The fatty acid patterns observed suggest that protein quality may alter fatty acid composition through modulation of desaturase activity. 相似文献
14.
Three groups of six pigs each (live weight at the beginning of the experiment 20 kg) were given a cereal ration with 8% rape seed meal. Group I did not receive a J supplement and was fed ad libitum. The rations of groups II and III were supplemented with 1 mg J/kg feed. The feed intake of group II was limited to the amount consumed by group I (pair fed); group III received the feed ad libitum. The daily weight gains of the 3 groups were 327, 377 and 613 g, feed expenditure 3.79, 3.68 and 3.47 kg/kg gain. In an N balance experiment carried out with 3 animals each from groups I and II, 41.4% of the N taken in group I and 43.8% in group II were retained (p greater than 0.05). Liver, intestinal fat and leaf were heavier in group I (p less than 0.01), the protein content of the empty body, the bones and bristles significantly lower than in group II. Protein retention in group II was 14% higher than in group I. In case of iodine deficiency protein retention is lower, energy retention, however, is largely unchanged. 相似文献
15.
Opapeju FO Nyachoti CM House JD Weiler H Sapirstein HD 《Journal of animal science》2006,84(10):2779-2786
An experiment was conducted to determine growth performance, carcass characteristics, and fat quality of growing-finishing pigs fed diets based on short-season corn hybrids. Twenty-four individually housed, Cotswold, growing pigs with an initial BW of 41.4 (SD = 1.4) kg were blocked by BW and sex and randomly allotted from within block to 1 of 3 diets to give 8 replicate pigs per diet. Experimental diets consisted of a control based on barley and 2 diets based on corn as the main energy sources. A 3-phase feeding program for 20 to 50 kg (phase I), 50 to 80 kg (phase II), and 80 to 110 kg (phase III) of BW was used. Diets for each phase contained approximately 3.5 Mcal/kg of DE, with total lysine of 0.95, 0.75, and 0.64% in phase I, II, and III diets, respectively. Average daily gain, ADFI, and G:F were monitored weekly during each phase. Pigs were slaughtered after reaching a minimum BW of 100 kg to determine carcass characteristics. There were no effects of diet on ADG, ADFI, and G:F (0.45 +/- 0.02, 0.34 +/- 0.02, and 0.31 +/- 0.02 for phase I, II, and III, respectively). Carcass length, dressing percent, LM area, loin depth, backfat thickness, belly firmness, and L*, b*, and a* fat color were not different across dietary treatments. Pigs fed one corn variety had no differences in fatty acid profile with barley-fed pigs, whereas those fed the other variety of corn had a greater (P < 0.05) concentration of PUFA in their backfat. The results indicate that growth performance, carcass characteristics, and fat quality of pigs fed diets based on short-season corn hybrids and those fed the barley-based diet were not different. 相似文献
16.
Hamed Karami Shabankareh Seyed Behnam Seyedhashemi Mehran Torki Hamidreza Kelidari Alireza Abdolmohammadi 《Tropical animal health and production》2012,44(8):1865-1871
The objective of this study was to evaluate if treatment of equine chorionic gonadotrophin (eCG)-superovulated Sanjabi ewes with repeated administration of human chorionic gonadotropin (hCG) would increase the number of normal corpus luteum (CL) and serum progesterone concentrations and decrease the number of persistent follicles. The superovulated ewes were divided into four groups on day 0 (day of sponge removal); the ewes were treated by an intramuscular administration of 500?IU hCG on day 0 (Group I: n?=?10), on days 0 and 1 (Group II: n?=?10), or on days 0, 1, and 2 (Group III: n?=?10) and no treatment for control group (n?=?10). Blood samples were collected on days 0, 1, 2, 5, and 8 (day of slaughter), and serum progesterone concentrations were determined. According to progesterone concentrations, 50 (4/8) and 0?% of the ewes underwent premature luteal regression in the control group and the hCG groups, respectively. There were more CLs in Group III than in Group II and the control group. Ewes treated with hCG had a greater number of normal-looking CL. CL diameter was significantly greater in Group II and Group III than other groups. Total CL weight was significantly (P?<?0.05) higher in Group III than in Group I and the control group. Number of persistent follicle and persistent follicle diameter were lower in control group compared to the other groups. Eight days after sponge removal, serum progesterone concentration was significantly higher in Group III than in Group I and the control group. The present results indicate that repeated administration of hCG supported CL formation, increased serum progesterone concentration, and prevented premature luteal regression in eCG-superovulated Sanjabi ewes. 相似文献
17.
B R Weeks J E Smith C K Stadler 《Journal of the American Veterinary Medical Association》1990,196(5):749-753
Eighteen 9- to 10-week old Beagles were fed casein-based diets (4,710 kcal of metabolizable energy/kg of body weight) containing either 12, 80, or 160 mg of iron/kg of diet. Growth and feed consumption were monitored throughout the 47-day study. Hematocrit (Hct), hemoglobin (Hb) concentration, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), RBC numbers, erythrocyte protoporphyrin (EP) concentration, serum iron concentration, serum total iron-binding capacity (TIBC), and serum ferritin concentration were determined weekly. Growth rate and feed efficiency were not significantly influenced by dietary iron content. At 14 days, Hb concentration, Hct, MCV, MCH, RBC numbers, and serum iron concentration were significantly (P less than 0.05) lower in dogs fed the 12 mg/kg diet, and remained significantly low for the remainder of the study. Erythrocyte protoporphyrin concentration increased significantly (P less than 0.05) by 14 days in dogs fed the basal diet, and remained significantly high relative to that in dogs of the other dietary groups for the remainder of the study. Serum ferritin concentration decreased in dogs of the group fed the basal diet, with a significant (P less than 0.05) difference beyond day 42. Differences in Hct, MCH, MCV, or hemoglobin, serum iron, serum ferritin, or EP concentration were not found between groups fed 80 and 160 mg of iron/kg of diet. Liver nonheme iron content was significantly (P less than 0.05) affected by dietary iron content. 相似文献
18.
本试验采用单因子随机化设计,将225只艾维菌肉仔鸡随机分为5个处理组,每个处理组设3个重复,每个重复15只鸡,以玉米-豆粕型日粮为基础日粮,饲喂处理1设为空白对照组;处理2添加猪油,设为猪油对照组;处理3、4、5分别添加低、中、高水平的浓缩大豆磷脂,为试验组.在0～3周龄猪油以2%,浓缩大豆磷脂分别以2%、3%、4%;在4～6周龄猪油以3%,浓缩大豆磷脂分别以3%、4%、5%添加到基础日粮中以替代相同比例的玉米,蛋白质水平维持不变.研究添加猪油和不同水平的浓缩大豆磷脂对肉仔鸡生长性能的影响,并对其作用机理进行了初步探讨.结果表明:在0～3周龄时,中、高水平试验组极显著地提高了采食量(P<0.01);在4～6周龄时,中水平试验组具有较大的采食量,但高水平试验组采食量有所下降;从全期来看,猪油对采食量影响不大;在0～3周龄,中、高水平试验组极显著地提高了增重(P<0.01),而且在此阶段添加油脂显著提高了饲料转化率(P<0.05);在4～6周龄时,添加油脂极显著提高了增重和饲料转化率(P<0.01);从全期来看,添加油脂可以提高增重与饲料转化率,且在0～3周龄时浓缩大豆磷脂优于猪油. 相似文献
19.
The aim of the experiment was to study the effect of pelleted and meal-form of a diet supplemented with lysine on passage rate through the digestive tract (DT) and utilization by young pigs. The experiment was carried out on 20 young boars of about 10 kg live weight, divided into 3 groups. The experimental diet composed of feeds of plant origin (barley 80.0%, sesame meal 10.6%, soybean meal 7.0%; total crude protein 15.3%) and supplemented with L-lysine to total level of 0.8% was fed twice daily as: a) a meal mixed with water (group I), b) dry meal (group II), c) pellets (group III). The experiment lasted 51 days including the last 6 days for nitrogen balance. On the first day of the collection period 3% Cr2O3 was included in the first meal to estimate the passage rate of feed. The average body weight at the end of the experiment was similar in group I and II (29.7 and 28.5 kg) but significantly lower as compared to group III (31.7 kg). Differences between the groups in the growth rate were higher during the first than the last period of the experiment. Pelleting reduced feed consumption per kg gain by about 12%. It was calculated that the increase in the live weight in group III could be attributed to the deposit of both protein and fat in the body. Large individual differences were observed in the rate of passage through DT and this probably effected the lack of significant differences between the groups. 相似文献
20.
本试验旨在研究不同饲喂水平对育成生长期雄性北极狐生长性能、血清生化指标及机体能量沉积的影响。试验选取46只85日龄,平均体重为（3 198±281）g的健康雄性北极狐,其中6只北极狐作为试验初屠宰试验对照,另外40只北极狐随机分成4组（每组10个重复,每个重复1只）,分别为自由采食组（AL）（I组）、自由采食量的80%组（IR80）（II组）、自由采食量的60%组（IR60）（III组）和自由采食量的40%组（IR40）（IV组）。预试期7 d,试验期55 d,通过饲养试验、血清学试验、屠宰试验并结合化学分析方法来评定生长性能、血清生化指标及机体能量沉积的各项指标。结果表明：1）IV组100日龄体重极显著低于I和II组（P<0.01）,与III组差异不显著（P>0.05）,IV组115日龄、130日龄、145日龄体重和平均日增重（ADG）极显著低于其他3组（P<0.01）,3组间差异不显著（P>0.05）。随饲喂水平降低,平均干物质采食量（ADMI）呈极显著降低趋势（P<0.01）,III组料重比（F/G）极显著低于I和II组（P<0.01）,与IV组差异不显著（P>0.05）。2）IV组血清葡萄糖（GLU）显著高于III组（P<0.05）,与I和II组差异不显著（P>0.05）;IV组血清胆固醇（CHO）和低密度脂蛋白胆固醇（LDL-C）极显著高于其他3组（P<0.01）,I、II和III组间差异不显著（P>0.05）;IV组血清总蛋白（TP）和白蛋白（ALB）显著高于I和III组（P<0.05）,与II组差异不显著（P>0.05）;对血清甘油三酯（TG）、高密度脂蛋白胆固醇（HDL-C）、球蛋白（GLOB）、免疫球蛋白A（IgA）、M（IgM）和G（IgG）、补体3（C3）和补体4（C4）、胰岛素（INS）均无显著影响（P>0.05）。3）随饲喂水平减少,毛皮脂肪沉积及其产热显著降低,I和II组显著高于III和IV组（P<0.05）,II组毛皮增重和沉积总能量显著高于IV组（P<0.05）,与I和III组间差异不显著（P>0.05）;IV组胴体增重极显著低于其他3组,3组间差异不显著（P>0.05）;对毛皮蛋白沉积及其产热、胴体脂肪沉积及其产热、蛋白沉积及其产热和胴体沉积总能量均无显著影响（P>0.05）。采取适当限饲（IR60）降低了育成生长期北极狐血清中糖脂类指标含量,保证了机体正常的生长和健康状态,提高了饲料转化效率,进而增加了养殖生产效益。 相似文献